I've been noticing a lot of overheating issues on my parts and I suspect that the fan is not getting enough power.
I have tested hotend temps from 170-210, all with similar results so I am pretty sure the issue is not caused by an excessively high printing temp. Granted, I am using a cheap PLA that I have had to bake to get rid of moisture, but I still don't think the issue is with the filament, because it has worked for me before.
I tried using Marty's alternate fan duct (found on wilson github), but there was barely any airflow coming out. To see if my fan was burnt out, I ordered two other fans with similar electrical specifications. When plugged in to the FET4 connection on the PICA board, they both made noise, but neither spun. I ordered two blower fans, you can see them here and here.
Because none of the fans that I've tried have worked, I suspect that my PICA board is not outputting enough power to my fan. I could be totally wrong about this conclusion, so I wanted to see what everyone else thought?
I am looking for suggestions on how to get my fan working again. Should I try another fan duct? Am I buying bad blower fans? Should I crimp on different connectors to my fan and plug it into another connection?